WO2003095252A1

WO2003095252A1 - Coated sun visor

Info

Publication number: WO2003095252A1
Application number: PCT/EP2003/004837
Authority: WO
Inventors: Miguel Angel Fernandez; Oscar Cuadra
Original assignee: Fico I.T.M S.A.
Priority date: 2002-05-08
Filing date: 2003-05-08
Publication date: 2003-11-20
Also published as: DE10220580B4; DE10220580A1; EP1507673A1; US7086681B2; US20060006689A1; JP2005529781A

Abstract

The present invention relates to a coated sun visor (100) particularly a blow molded sun visor with a spring element (90) for mounting said sun visor (100) in a motor vehicle which is fixed by means of a profiled surface in said sun visor body. The method for manufacture of the coated sun visor comprises the following steps: Inserting two plastic plates (40) in plane opposed arrangement in a blow mold (10, 29) and inserting at least one layer of coating material (50) between plastic plates and blow mold; inserting of a spring element (90) and a pipe (30) for gas or fluid supply between the at least two plastic plates; closing said blow mold and forming of said plastic plates by the application of pressure via said pipe (90) = connecting of said coating (50) with said plastic plates (40) and fixing of said spring element (90) on said plastic plates.

Description

Coated sun visor

1. Field of the invention

The present invention relates to a blow molded coated sun visor particularly for motor vehicles as well as a method for its manufacture.

2. Prior art

It is known that sun visor bodies are produced by blow molding methods. In the scope of this manufacturing method, e.g. a heated tube is extruded in a blow mold, said blow mold is subsequently closed and then said extruded tube is shaped corresponding to shape specifications of the blow mold for example by heated air. The sun visor bodies produced by this method mostly consist of unhandsome plastic materials which have to be adapted by an outer designing to the interior equipment for example of a motor vehicle. This designing is for example carried out by the application of flakes or by covering by means of different materials as for example clothes or plastics or foil coatings. Based on the plurality of procedure steps, these methods are time and cost intensive.

EP 0 514 616 discloses a blow molding method in which a hollow body can be both shaped and coated. It follows therefrom that the number of the above mentioned procedure steps for the outer designing can be reduced and thereby the induced production costs can be lowered. In the scope of this method, plastic plates and chosen coating materials are inserted in the blow mold, connected in their edge area by the application of heat and subsequently molded by the injection of gases or fluids. This method is for example qualified for producing pallets, parts of car seats or traffic signs. For the production of the plastic lining of motor vehicles, the EP-A-1 153 725 discloses a further blow molding method. Said method is qualified by adding further elements to the blow molded body by means of an additional injection molding procedure without removing said body from the blow mold. However, said injection molded elements can only be mounted at the uncovered side of the lining.

Said blow molding method with simultaneous outer coating is used for the manufacture of sun visors in the EP-A-0 652 099. These sun visors show an insufficient mechanical stability if the outer wall thickness is too low. The wall thickness of the sun visor body can be increased which, however, induces an increased weight of the sun visor as well as additional material costs and longer working times. The increased weight of the sun visor produced in this way also leads to an expensive fixing of the sun visor and the motor vehicle. In the construction, the known fixing element of the sun visor -ire not designed in such a way to withstand the mechanical loading in the motor vehicle during fixing of these heavy sun visors.

Further methods for the manufacture of blow molded sun visors are disclosed in EP-A-0 525 148 and EP-A-0 562 085. To achieve a certain mechanical stability of the blow molded sun visor bodies, on the one hand reinforcing bridges 310 are punched in the sun visor body 300 (cf. Fig. 6) or on the other hand the whole sun visor body is filled with a further plastic material. A spring element 350 for the later mounting of the sun visor in the motor vehicle is fixed by holding ribs 330.

The holding ribs 330 are punched in the sun visor body 300 from the outside so that they clamp the spring element 350. The holding ribs 350 are visible from the outside as recesses in the sun visor body 300. These recesses cannot be satisfyingly covered by outer coatings of the sun visor body. Thereby, the appearance of the sun visor gets worse. Additionally, they guarantee no reliable connection of said spring element since they only partly surround and clamp the same.

Although the sun visor bodies manufactured in this way show a sufficient mechanical stability, they have an unhandsome appearance and, thus, have to be designed from the outside by further procedure steps. As already mentioned above, the application of flakes or the covering are used for the outer designing of the sun visor bodies.

It is therefore the problem of the present invention to provide a sun visor and a method for its manufacture which shows an improved stability and further which can be reliably fixed in the motor vehicle.

3. Summary of the invention The above problem is solved by a sun visor of motor vehicles, particularly a blow molded sun visor, having a sun visor body with outer coating for adapting the sun visor to the interior of a motor vehicle comprising at least one stabilizing bridge for a stabilized connection of the opposed inner walls of the sun visor body and a spring element mounted in the inner of the sun visor body for fixing the sun visor in the passenger compartment of the motor vehicle wherein neither the position of the at least one stabilizing bridge nor the mounting of the spring element are visible from the outside.

The sun visor according to the invention is manufactured by means of a blow molding method in which at the same time an outer coating is fixed onto the sun visor body. To this end, e.g. two plastic plates are molded in a blow mold corresponding to the shape of the sun visor. For the later fixing of the sun visor in the motor vehicle, a spring element is arranged between said plastic plates to connect the same with said plastic plates during blow molding. Said spring element serves for example for receiving a holding device fixed in the motor vehicle particularly a pin on which the sun visor is then moveably mounted. Based on the mechanical loading to which the spring element is subjected by the movement of the sun visor and the vibration in the motor vehicle, the fixing of the spring element on said plastic plates have to be long-life and stable.

At the same time, the appearance of the sun visor may not be worsened by the way of mounting the spring element. The same applies for the stabilizing bridges in the sun visor body which are preferably positioned and shaped so that they are covered by further accessories as for example a mirror, from the outside. Thus, the position of the stabilizing bridges and the way of mounting the spring element is chosen in such a way that they are not visible from the outside.

According to a further preferred embodiment of the present invention, said spring element is mounted on the inner wall of the sun visor body by means of a profiled surface wherein the profiled surface of the spring element comprises openings, barbs, openings with barbs or hook-like structures.

The above mentioned reliable and long-life connection between said spring element and said sun visor body is particularly realized by the provision of a profiled surface of the spring element. This profiled surface partly or completely penetrates with its structure in the plastic plates during blow molding and/or the plastic penetrates the profile of said spring element.

The different structures of such a profile realize besides the connection of the metal surface with said plastic surfaces an additional positive connection by engagement of the hook-like structures in said sun visor body. Additionally, the barbs or hook-like structures contribute to the fact that the spring element engages the plastic plates and realizes in this way a long-life connection.

According to a further preferred embodiment of the present invention, said spring element comprises a connecting layer for fixing said spring element in said sun visor body which is arranged between said spring element and said inner wall of said sun visor body. The connecting layer is preferably made of plastic which adheres to metal surfaces.

The stable connection between the spring element and the sun visor body is realized by a sandwich structure according to a preferred embodiment of the present invention, which is comprised of said spring element, a connecting layer and the respective plastic plates of the sun visor body. The connecting layer is featured in that on the one hand it shows good bonding properties onto metal surfaces and on the other hand it provides stable and reliable connection to the plastic plates. Said connecting layer is preferably activated by the application of heat during the blow molding method. It is, however, also conceivable that the connecting layer is made of a suitable adhesive. It is also preferred according to the present invention that the profiled surface of the spring element is used together with said connecting layer. It follows therefrom that the advantages of both connecting means are combined in order to guarantee a stable and reliable mounting of the spring element in the sun visor body. In this case, preferably according to the invention the thickness and the extension of the connecting layer can be adapted to the profiling and the size of the spring element. For example this includes that said hook-like structures penetrate said connecting layer and further engage said plastic plates.

According to a further preferred embodiment of the present invention, said sun visor bodies comprise recesses for retaining accessories particularly mirrors wherein at least a sub area of said recess connects the opposed walls of the sun visor body by stabilizing bridges to enhance the mechanical stability of the sun visor.

Preferably according to the invention, said sun visors are blow molded as hollow bodies having a low wall thickness. A low weight of the sun visor results therefrom which simplifies the later installation of the sun visor in the motor vehicle. In this context, it is also necessary to assure the mechanical stability of the sun visor body. To this end, it is preferred according to the invention that at least one sub area of the wall of said recess existing in said sun visor body extends to the opposed wall of the sun visor body. In this way, a supporting connection is generated between said opposed walls of the sun visor body which is invisibly arranged inside of the sun visor body. This supporting connection enhances the stability of the hollow body and leads to no important weight increase. Preferably according to the invention, besides these walls also other areas of said recess can be structured in such a way that they contribute to a support between the opposed walls of the sun visor body. In this context, it is taken the advantage that these structures are later covered by the accessories to be installed as for example a mirror. Thus, said supporting or stabilizing elements are later not visible from the outside.

According to a further preferred embodiment of the present invention, the sun visor comprises a holding bridge for a releasable fixing of the sun visor in a motor vehicle which is formed by a plastic cylinder.

According to common practice, a sun visor is mounted at two points in a motor vehicle. A first point is formed by the pivotable connection at the spring element and the second point by said holding bridge which is normally snapped into a clamp provided therefor. The connection between the holding bridge and the clamp is releasable so that the sun visor can be adjusted corresponding to the light conditions. Based on the frequently releasing and re-connecting of the holding bridge and the clamp, the cover or coating of said holding bridge is weared and, thus, leads to a degradation of the appearance of the sun visor. Because of this reason, said holding bridge is preferably according to the invention made of a plastic cylinder which comprises no further covering. This plastic cylinder is suitable to survive a plurality of releasing and connecting cycles without mechanical damage. Furthermore, it is possible to adapt the plastic cylinder in colour and outer structure of the surface to the appearance of the sun visor. Further, the present invention comprises a method for manufacturing a coated sun visor particularly for motor vehicles comprising the following steps: Inserting of at least two plastic plates in plane opposed arrangement in a blow mold for sun visors consisting of two blow mold halves having a projection for forming at least one stabilizing bridge, inserting of at least one layer of coating material respectively between one of said plastic plates and the adjacent wall of said blow mold and inserting of a spring element with a pipe for gas or fluid supply between the at least two plastic plates; closing said blow mold and molding said plastic plates to a sun visor body with stabilizing bridges for a stabilizing connection of the opposed inner walls of the sun visor body wherein neither the position of the at least one stabilizing bridge nor the mounting of said spring element are visible from the outside.

Preferably according to the invention, said sun visor is manufactured by a blow molding method with simultaneous outer coating by a selected material. At the same time and besides the coating, also the spring element is permanently fixed in said sun visor body. Based on the configuration of the blow mold and the construction of the spring element, a stable sun visor is formed which at the same time reliably mounts a spring element in said sun visor body. The mounting of said spring element is not visible from the outside so that it does not interfere with the appearance of the sun visor and so that a further coating of this area is prevented.

According to a preferred embodiment of the present invention, the fixing of said spring element in the sun visor body is realized via a profiled surface or via an additional connecting layer or via the cooperation of said profiled surface and said connecting layer.

In the scope of the manufacturing method according to the invention of said sun visor, said plastic plates become deformable by the application of heat. This deformability is used according to the invention to realize a long-life and mechanically stable connection between said spring element and said plastic plates of the sun visor body. In this case, the profiled surface of said spring element having for example hook-like structures engages the respective plastic plate of the sun visor body. It is also conceivable that the connection is realized by a connecting layer wherein this connecting layer can for example be activated by the application of heat. It is also conceivable that this connecting layer can be hardened even by the application of heat to realize a stable connection between the spring element and the sun visor body. Preferably according to the invention, it is also a combination of the profiled surface of the spring element and the connecting layer conceivable.

According to a preferred embodiment of the method according to the invention, at least one recess for receiving accessories is formed in at least one of said plastic plates. In this context, it is preferred according to the invention to form a connecting stabilizing bridge between the opposed walls of said sun visor body within said recess to enhance the mechanical stability of the sun visor.

According to a further preferred embodiment of the present invention, a holding bridge for releasably fixing said sun visor in a motor vehicle is inserted in said sun visor which is formed by a plastic cylinder.

According to a further preferred embodiment of the present invention, the method comprises a further step of injection molding at least one element of said sun visor. Said injection molding is preferably executed during the blow molding.

It is further preferred according to the invention, to add further elements to said sun visor by an injection molding method. Based on this inventive combination, the different advantages of both manufacturing methods can be used to optimally configure said sun visor. The efficiency of the method is furthermore supported by the fact that said blow molding and said injection molding are preferably according to the invention executed at the same time. A shortening of the manufacturing time of the sun visor according to the invention results therefrom.

According to a further preferred embodiment of the present invention, said injection molding is executed via heated channels whereby undesired material scrap or sprue is prevented at the molded sun visor.

The injection molding material is preferably according to the invention supplied via heated channels within the blow mold. Also after completing the manufacturing process, these channels are heated so that the material contained therein does not cure. The subsequent manufacturing cycle can thus use the material contained in these channels. It is furthermore prevented by this heating that material scrap or sprue remains at the sun visor. In this manner, on the one hand material is saved and on the other hand an expensive finishing of the sun visor is shortened or prevented.

4. Short description of the drawing

The preferred embodiments of the present invention are described referring to the drawing. The following drawings show:

Fig. 1 a general view of a preferred embodiment of the sun visor with mirror according to the invention wherein two cutting lines are shown along the line II-II and III-III;

Fig. 2 a sectional view of said sun visor along the line II-II from Fig. 1 ;

Fig. 3 a sectional view of said sun visor along the line III-III from Fig. 1 ;

Fig. 4 an open blow mold according to a preferred embodiment of the present invention comprising two halves with inserted material to be processed and an arrangement for injection molding; Fig. 5 A-D different embodiments of the spring element having a profiled surface or a connecting layer; and

Fig. 6 a sun visor with punched holding ribs for a spring element according to the prior art.

5. Detailed description of the preferred embodiments

The present invention relates to a method for manufacturing coated sun visors and to coated sun visors manufactured by this method. By referring to Fig. 4, first of all the method of manufacture is described.

The blow mold 1 shown in Fig. 4 has two opposed blow mold halves 10, 20. These blow mold halves 10, 20 define the shape of the later coated sun visor 100 by their inner structure. Further, said blow mold halves 10, 20 contain certain shape specifications for the later fixing of accessories in the coated sun visor 100. For example, recesses 170 can be incorporated in the sun visor 100 which can later receive mirrors 180 or lamp arrangements (cf. Fig. 3). The forming of such a recess 170 is executed for example in the blow mold halve 20 by the profiling 70. The profiling 70 preferably according to the invention also forms mounting elements in the later sun visor body for retaining of accessories. For example snapping connections are such mounting elements which can latch a corresponding accessory part in the sun visor 100.

Furthermore, the blow mold halve 20 comprises projections 60 for forming stabilizing bridges 160 in the sun visor 100 in said forming area 70 for said recess and the fixing of the accessory in the sun visor 100. These projections 60 are preferably according to the invention arranged along the walls 172 to be formed of said recess 170 which run in the direction of the opposed wall of the sun visor 100. It is also preferred according to the invention to arrange said projections 60 within the profiling 70 for the recess 170. The projections 60 form stabilizing bridges 160 during the manufacturing process for sun visors 100. These stabilizing bridges 160 connect the opposed walls of the sun visor 100 and contribute in this way to a stabilization of the hollow body having low wall thicknesses. In this way, it is guaranteed that despite of low wall thickness and despite of low weight of the hollow body a high stiffness and stability of the sun visor 100 is realized. Because of this reason, the sun visor 100 is not bent or twisted during the installation and the use whereby on the one hand a reliable fixing in the motor vehicle is guaranteed and on the other hand the accessories 180 have only to be mounted with limited technical efforts. By the arrangement according to the invention of the projections 60 for forming said stabilizing bridges 160 it is further according to the invention guaranteed that these stabilizing bridges 160 are later not visible from the outside. Said stabilizing bridges 160 are covered by the later installation of accessories 180 in the sun visor 100 whereby they have no negative effect on the appearance of the sun visor 100.

According to a further preferred embodiment of the present invention, the blow mold 1 comprises an injection molding system 22. Said injection molding system 22 serves for molding further elements of the sun visor during the blow molding process or after completing the blow molding process. During the execution of both methods, the sun visor to be manufactured remains in the blow mold 1 whereby procedure steps can be saved and whereby the complete manufacturing time of the sun visor can be shortened. Preferably according to the invention, retaining elements for a accessories 180 are produced by means of said injection molding method within said recess 170 wherein this method can be also used to add further constructive or other elements. As further embodiment of the present invention, the injection molding method can be used for designing or fashioning said sun visor.

During the injection molding process, material is preferably according to the invention supplied to said sun visor to be manufactured via the material supply 24 and separate channels 26 or a channel system. Said material supply 24 is preferably connected to an extruder (not shown) which prepares the material for processing. Other known material processing steps can, however, also be executed before supplying the material to the injection molding process.

The injection molding system 22 comprises different channels 26 which can preferably according to the invention vary in cross-section, course and branching. The channels 26 run into a pre-form 29 at the inner wall of the blow mold half 20 via an injection molding nozzle. The pre-form 29 determines the shape and the position of the element to be injection molded of said sun visor. Dependent on the shape and the number of elements to be injection molded, said pre-forms 29 can be arbitrarily arranged in said blow mold 1.

Preferably according to the invention, the channels 26 of said injection molding system 22 are heated by means of heating elements 28. This heating is achieved for example by a resistor or other systems known for heat generation. The heat supply guarantees that the material in said channels 26 does also not cure after finishing the injection molding process. The manufactured sun visor 100 and, thus, also the material in the pre-form 29 cure completely. In this manner, it is at least partly or completely prevented that material scrap or sprue is formed at the injection molded elements which has to be removed by later expensive finishing procedure steps.

The material scrap or sprue is also minimized by supplying the material preferably according to the invention via small openings in said injection molding nozzles 27 into said pre-form 29. The possibly existing material scrap or sprue has thereby only a small cross-section and it can be easily removed. A further positive effect of this procedure arrangement consist in an effective material exploitation or in a material saving and time saving compared to conventional methods.

Preferably according to the invention, the injection molded elements are made of polypropylene or polypropylene containing 20 % glass powder. It is also preferred to use all materials applied for injection molding as far as they meet the requirements of the sun visor. The elements to be injection molded are formed on all arbitrary material layers of said sun visor 100 to be manufactured and they are fastened by said injection molded process. It is further preferred also to omit the outer layer beneath said elements to be injection molded in order to support the fixing of the same. Thereby, a welding for fixing used in conventional procedures is saved also more effectively organizing the manufacturing process.

The blow mold 1 for sun visors 100 was described according to the preferred embodiment for manufacture sun visors 100. In this context, it is also conceivable that a plurality of sun visors 100 can be manufactured by a corresponding blow mold at the same time.

Within the scope of the method preferably according to the invention for manufacture said sun visor 100, the materials to be processed in shape of plates, layers or sheets are inserted between the blow mold halves 10, 20 before closing the blow mold halves 10, 20. First of all, at least two plastic plates 40 are preferably according to the invention inserted into the blow mold 1. Said plastic plates 40 consist preferably according to the invention of thermoplastic materials as for example polypropylene or other thermoplastic deformable plastics. In this context, it is also possible to process recycled plastics. Although only two plastic plates 40 are shown in Fig. 4, also sandwiched structures can be inserted instead of said plastic plates 40. These sandwich structures can consist of multiple plastic layers and different plastic materials. They serve for example for the achievement of certain mechanical and optical properties of said sun visor 100.

Further, a layer of the outer coating 50 of the sun visor 100 is inserted in the blow mold 1 between the blow mold halve 10, 20 and the plastic plate 40. This outer coating 50 consists according to the invention preferably of clothes, leather, plastics, foils or other materials which are suitable for the outer designing and for the adaptation of the sun visor 100 to the interior of the motor vehicle. Before starting the forming of the sun visor 100 in the blow mold 1, preferably according to the invention fixing elements are positioned between the plastic plates 40. These fixing elements serve for the later fixing of the sun visor 100 in the motor vehicle. Said fixing elements comprise for example a holding bridge 80 and a spring element 90. The spring element 90 has preferably according to the invention a U-shaped or a double U-shaped configuration which will be discussed later in detail and it serves also for receiving the pipe 30 during the manufacturing process. According to a further preferred embodiment of the present invention, said spring element 90 has a closed shape compared to the open U-shaped shape. This shape can be 4-squared, oval, elliptical or the like. By this closed shape, the stability of the spring element 90 is increased and the mounting of the sun visor according to the invention in the motor vehicle is further supported thereby. The holding bridge 80 is preferably according to the invention a plastic cylinder which serves later for a releasable connection of the sun visor 100 in a clamp in the motor vehicle.

After inserting the different material layers 40, 50 and the fixing elements 80, 90, the plastic plates 40 are plastified by heat supply. The heat is for example supplied via the pipe 30 in the form of warm air in a temperature range of 150 - 180°C. Preferably according to the invention, said pipe 30 is arranged between said opposed plastic plates 40 in order to prevent the adherence of said plastic plates 40 at each other by injecting the warm air. For the supply of heat it is also conceivable to inject other gases or heated fluids via the pipe 30 for rinsing the blow mold this way. According to a further preferred embodiment, the above mentioned material layers 40, 50 are at first heated or plastified in a furnace and subsequently positioned in said blow mold 1. Besides the furnace, conventional heating elements or irradiation is used for this plastifying process. After positioning of said material layers 40, 50 in said blow mold 1, the blow molding is executed via said pipe 30. According to a preferred embodiment of the present invention, cold air is supplied via said pipe 30. In this manner, a cooling of the molded body is simultaneously realized with the blow molding leading to a shortening of the manufacturing cycle.

The blow mold halves 10, 20 are still moved to each other in order to close in this way the blow mold 1 while supplying heat via the pipe 30. By closing the blow mold 1 , the plastic plates 40 are compressed in their edge area that means in the area where no hollow space exists, and they are thereby connected. The connection is supported by the plastified plastic plates which subsequently occur.

After closing the blow mold 1, said plastic plates 40 are preferably according to the invention blow molded. The blow molding is preferably according to the invention executed by injection of compressed air via the pipe 30 in the blow mold 1. It is also conceivable that other compressed gases or fluids are used for blow molding the sun visor 100. Based on the supply of the compressed air via the pipe 30, said plastic plates 40 and the outer coating 50 are pressed against the inner walls of the blow mold halves 10, 20. Thus, they take on the forms defined by the blow mold 1. In this context, it is important to mention that the height of the projections 60 for the stabilizing bridges 160 has to be adapted to the wall thickness of said sun visor 100 or of said plastic plates 40. That means the opposed walls of the later sun visor 100 or the plastic plates 40 in the blow mold 1 have to still contact each other during the blow molding process in order to produce a connecting and stabilizing connection between the opposed walls or between the plastic plates 40 of the sun visor 100. The projections 60 of the stabilizing bridges, thus, have to be adapted to the thickness of the plastic plates 40 or the thickness of the walls of the sun visor 100. After completing the molding, said plastic plates 40 form the walls of the sun visor 100 which together are also described as sun visor body.

The projections 60 preferably according to the invention for forming the stabilizing bridges 160 can comprise different shapes as far as they are sufficient to stabilizing and supportingly connect the opposed walls of the sun visor 100. For example, these shapes can be angular, cylindrical, cone shaped or tapered in other ways. Based on the tapered shape of the projections 60, the distortion of the outer coating is reduced during the blow molding of the sun visor 100. In this way, it is for example prevented that folds are generated in the outer coating 50 which negatively influence the appearance of the sun visor 100.

Preferably according to the invention, the plastic plates 40 are pressed against the inner walls of the blow mold halves 10, 20 via the outer coating 50 during the blow molding process. By this process, said plastic plates 40 and the outer coating 50 are connected so that during the subsequent hardening a coated sun visor 100 is generated. Furthermore, said plastic plates 40 connect preferably according to the invention to the holding bridge 80 and the spring element 90 during the blow molding process. A connection between the spring element 90 and the plastic plates 40 is preferably according to the invention realized either by profiled surface 96 of the spring element 90 or by a provided connecting layer 98 between the spring element 90 and the plastic plates 40 (cf. Fig. 5). According to a further preferred embodiment of the present invention, the profiled surface 96 of the spring element 90 can be used in combination with a connecting layer 98. This connection is later addressed in detail.

After forming the sun visor 100 in the blow mold 1, the pipe 30 fixed in the spring element 90 is removed. Subsequently, the blow mold 1 is opened so that the formed sun visor 100 can be removed therefrom, preferably according to the invention, finishing steps are carried out on the sun visor 100. These finishing steps comprise for example removing of projecting plastic and coating residual in the edge area of the sun visor 100. Furthermore, these finishing steps comprise preferably according to the invention the installation of accessories 180 in the sun visor 100. Further, it is conceivable that sun visor 100 is for example designed in colour or impregnated from the outside. Fig 1 shows a general view of the sun visor 100 according to a preferred embodiment of the present invention which was manufactured by the above described blow molding method in the blow mold 1. On one side of said sun visor 100 a mirror is installed as accessory 180. Furthermore, said sun visor 100 comprises a holding bridge 80 which serves for the mounting of said sun visor 100 in the passenger compartment of the motor vehicle besides the below described spring element 90. The sun visor 100 according to the invention comprises a stable sun visor body as well as reliably mounted mounting means, as for example said spring element 90. The fixing of said spring element 90 is not visible from the outside and, thus, does not disturb the appearance of the sun visor.

Fig. 3 shows a cut through said sun visor 100 along the line III-III of Fig. 1. The sun visor 100 comprises an outer coating 50 and plastic walls 40. Additionally, a recess 170 for receiving accessories 180 is formed. In the area of said recess 170, stabilizing bridges 160 are arranged inside of the sun visor 100 which connect the opposed plastic walls 40 of the sun visor 100 to each other in a stabilizing way. The stabilizing bridges 160 are preferably according to the invention arranged in the edge area of the recess 170 or in the inside of the recess 170. In this context, the walls 172 of the recess 170 are meant by the edge area of the recess 170 which run in the direction of the opposed wall of the sun visor 100. Additionally, the sun visor 100 comprises the fixed spring element 90 and the fixed holding bridge 80.

By referring to Fig. 5 and the different embodiments of said spring element 90 depicted there in the sub illustrations A, B, C, D, the fixing according to the invention and the construction of the spring element 90 is described. The spring element 90 comprises preferably according to the invention an upper part 92 and a lower part 94. The upper part 92 of the spring element 90 serves for the later mounting of the sun visor 100 in the motor vehicle. To this end, it receives for example a pin which is mounted in the interior of the motor vehicle and guarantees in this way a pivotable mounting of the sun visor 100 in the motor vehicle.

The lower part 94 of the spring element 90 serves for the mounting of the spring element 90 in the sun visor 100 and particularly onto the plastic plates 40. Because of this reason, the lower part 94 is configured as large surface compared to the upper part 92 of the spring element 90. The opposed plates 96 of the lower part 94 of the spring element 90 form a rigid connection with said plastic plates 40 and, thus, with said walls 40 of the sun visor 100 during the manufacture of the sun visor 100 by blow molding in the blow mold 1. This connection is preferably according to the invention supported by the configuration of the opposed plates 96 of the lower part 94. The opposed plates 96 of the lower part 94 of the spring element 90 comprise different preferably according to the invention profiles which are shown in Figs. 5a, 5b and 5c. These profiles comprise different sharp- edged openings, hook-like structures, barbs, different indention shapes (not shown) and spike-like projections (not shown). The above mentioned profiles are respectively directed to the walls 40 of the sun visor 100 in order to be mounted therein. In this connecting process between said spring element 90 and the walls 40 of the sun visor 100, also a positive connection between the sun visor wall 40 and the opposed planes 96 of the spring element 90 is formed besides other ways of connections. Even the shape of the inventive profiles guarantees that the spring element 90 is fixed permanently and reliably in the sun visor 100. In this way, the mechanical loads generated by the use of the sun visor and received by the spring element 90 do not lead to a loosening of the spring element 90 and, thus, to a fast failure of the fixing of the sun visor 100 in the motor vehicle.

According to a further preferred embodiment of the present invention, the profiled surfaces 96 are realized by an additional element (not shown). This element is made for example of a profiled metal or plastic plate which has a similar size like the lower part 94 of said spring element 90. In view of the size of said element, it is also conceivable that it is made smaller than the lower part 94 as long a sufficient mounting is realized thereby. Further, it can also be bigger in size than the lower part 94. In this case, plane elements are conceivable, or said elements have finger-like or elongated structures which along said walls of said sun visor abut or engage said walls. Preferably according to the invention, said element is mounted on the sides of said lower part 94 which face the inner walls of said sun visor body. For mounting, all conceivable mechanical and chemical fixing means can be used as for example adhesive, rivets, screws, clamps.

A further fixing of said spring element 90 is shown in Fig. 5D. Preferably according to the invention, the opposed planes 96 are coated by a connecting layer

98 in this spring element 90. This connecting layer 98 has the property on the one hand to provide a rigid connection with metal surfaces and on the other hand to realize a rigid connection with plastic surfaces. In this way, it is guaranteed that a reliable and stable connection between the spring element 90 and the sun visor 100 is realized. This connecting layer 98 can be comprised for example of specially adapted adhesives or other plastics which show the above mentioned properties. The connecting properties of the connecting layer 98 can be for example activated by the influence of heat or the later cooling. It is also conceivable to use a connecting layer 98 which forms rigid connection after expiration of a certain hardening time.

Also preferably according to the invention, a combination of the profiled surfaces of the opposed planes 96 of the spring element 90 and said connecting layer 98 can be used to fix said spring element 90 in said sun visor 100. In this case, said profiles are configured in such a way that they penetrate said connecting layer 98 in order to form in this way a positive connection with both the connecting layer 98 and the wall 40 of the sun visor 100.

Fig. 2 shows a sectional illustration of said sun visor 100 along the line II-II of Fig. 1. In this illustration, the single elements of said sun visor 100 as well as the position and the mounting of said spring element 90 are shown. Said sun visor 100 comprises an outer coating 50, said plastic walls 40 forming said sun visor body and said spring element 90 for mounting said sun visor 100 in the motor vehicle. The below U-shaped portion of said spring element 90 is shown according to a preferred embodiment of the present invention on the one hand with a profiled surface (left) and on the other hand with openings in said surface (right). One sees on the left side of the U-shaped portion of the spring element 90 that said plastic plate 40 or said sun visor body engages the openings of said spring element 90. On the right hand side, the profiled surface of said spring element 90 engages said sun visor body. Thereby, said spring element 90 is permanently and reliably mounted in said sun visor body in two different ways. At the same time, said mounting is not visible from the outside although said sun visor body also forms a positive connection with said U-shaped portion of said spring element 90.

List of reference signs

1 Blow mold

10, 20 Blow mold halves

22 Injection molding system

24 Material supply

26 Channel

27 Injection molding nozzle

28 Heating element

29 Preform

30 Pipe

40 Plastic plates

50 Outer coating

60 Projections for stabilizing bridges

70 Profile for the recess

80 Holding bridge

90, 350 Spring element

92 Upper part of the spring element 90 94 Lower part of the spring element 90

96 Opposed planes of the lower part 94 of the spring element 90

98 Connecting layer

100 Coated sun visor 160 Stabilizing bridge

170 Recess

172 Wall of said recess

180 Accessories

300 Sun visor body 330 Holding ribs

Claims

1. A sun visor for motor vehicles, particularly a blow molded sun visor, having a sun visor body with outer coating for adapting said sun visor to the interior of the motor vehicle, comprising:

a. at least one stabilizing bridge for a stabilized connection of the opposed inner walls of said sun visor body; and

b. a spring element mounted in the inner of said sun visor body for fixing said sun visor in the interior of the motor vehicle wherein

c. neither the position of the at least one stabilizing bridge nor the mounting of said spring element are visible from the outside.

2. Sun visor according to claim 1, wherein said spring element is mounted by a profiled surface on the inner wall of said sun visor body.

3. Sun visor according to claim 2, wherein said profiled surface of said spring element comprises openings, barbs, openings with barbs or hook-like structures.

4. Sun visor according to claim 2, wherein said spring element comprises a connecting layer for mounting said spring element in said sun visor body which is arranged between said spring element and said inner wall of said sun visor body.

5. Sun visor according to claim 4, wherein said connecting layer is made of a plastic material which adheres to metal surfaces.

6. Sun visor according to claim 1, wherein said sun visor body comprises a recess for receiving accessories particularly a mirror.

7. Sun visor according to claim 6, wherein at least one sub area of said recess connects the opposed walls of said sun visor body by stabilizing bridges to enhance the mechanical stability of said sun visor.

8. Sun visor according to claim 1, wherein said sun visor comprises a holding bridge for releasably mounting said sun visor in a motor vehicle which consists of a plastic cylinder.

9. A method for manufacture a coated sun visor, particularly for motor vehicles, comprising the following steps:

a. inserting of at least two plastic plates in plane opposed arrangement in a blow mold for sun visors having two blow mold halves with a projection for forming at least one stabilizing bridge, inserting of at least one layer of a coating material respectively between one of said plastic plates and the adjacent wall of said blow mold and inserting of a spring element with a piper for supplying gas or fluids between the at least two plastic plates;

b. closing said blow mold and molding said plastic plates to a sun visor body having stabilizing bridges for a stabilizing connection of the opposed inner walls of said sun visor body wherein

10. A method for manufacture of a coated sun visor according to claim 9, wherein said spring element is fixed to said plastic plates via a profiled surface or via an additional connecting layer or via the cooperation of said profiled surface and said connecting layer.

1 1. Method for the manufacture of coated sun visors according to claim 9, further comprising the forming of at least one recess for receiving accessories in at least one of said plastic plates.

12. Method for the manufacture of coated sun visors according to claim 1 1, wherein said connecting stabilizing bridges between said opposed walls of said sun visor body are formed within said recess to increase the mechanical stability of said sun visor.

13. Method for the manufacture of coated sun visors according to claim 10, wherein a holding bridge for releasably mounting said sun visor in a motor vehicle is installed in said sun visor which is formed by a plastic cylinder.

14. Method for the manufacture of coated sun visors according to claim 9, further comprising the step of

injection molding at least one element of the sun visor.

15. Method for the manufacture of coated sun visors according to claim 15, wherein the injection molding is executed during the blow molding.

16. Method for the manufacture of coated sun visors according to claim 15, wherein said injection molding is executed via heated channels whereby undesired material scrap or sprue is prevented at the molded sun visor.